1、Designation: D 6587 00 (Reapproved 2006)e1Standard Test Method forYarn Number Using Automatic Tester1This standard is issued under the fixed designation D 6587; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revis
2、ion. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTESection 3 was updated editorially in August 2006.1. Scope1.1 This test method covers the measurement of yarnnumber of filament and sp
3、un yarns using automated testers.Some of the instruments are stand-alone and others are optionalmodules for instruments that perform additional tests.1.1.1 The instruments are capable of measuring yarn num-bers up to 4000 dtex (3600 denier).NOTE 1For determination of yarn number by use of reel and b
4、alance,refer to Test Method D 1907.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. Within the text, theinch-pound units are in parentheses. The values stated in eachsystem are not exact equivalents; therefore, each system shallbe used independen
5、tly of the other. Combining values from thetwo systems may result in inaccuracies of results.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health prac
6、tices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 123 Terminology Relating to TextilesD 1776 Practice for Conditioning and Testing TextilesD 1907 Test Method for Linear Density of Yarn (YarnNumber) by the Skein MethodD 2258 Pra
7、ctice for Sampling Yarn for TestingD 4849 Terminology Relating to Yarns and Fibers3. Terminology3.1 For all terminology relating to D13.58, Yarns andFibers, refer to Terminology D 4849.3.1.1 The following terms are relevant to this standard:cotton count, denier, linear density, tex, yarn number, yar
8、nnumbering system3.2 For all other textile terms used in this test method, seeTerminology D 123.4. Summary of Test Method4.1 A specified length of yarn (specimen) is automaticallystripped directly from the package, cut, and weighed. The yarnnumber is calculated by an interfaced computer, displayed o
9、n amonitor, and may be printed. The yarn number can be reportedin tex, denier, or cotton count units.5. Significance and Use5.1 This test method for yarn number is satisfactory foracceptance of commercial shipments and is used in the trade.5.1.1 In case of a dispute arising from differences inreport
10、ed test results when using this Test Method for accep-tance testing of commercial shipments, the purchaser and thesupplier should either use the referee Test Method D 1907 foryarn number or conduct comparative tests to determine if thereis a statistical bias between their laboratories. Competentstat
11、istical assistance is recommended for the investigation ofbias.As a minimum, the two parties should take a group of testspecimens that are as homogeneous as possible and that arefrom a lot of material of the type in question. The testspecimens should then be randomly assigned in equal numbersto each
12、 laboratory for testing. The average results from the twolaboratories should be compared using appropriate statisticalanalysis and a probability level chosen by the two partiesbefore the testing is begun. If a bias is found, either its causemust be found and corrected or the purchaser and the suppli
13、ermust agree to interpret future test results with consideration tothe known bias.5.2 This test method is also used for the quality control forboth filament and spun yarns.6. Apparatus6.1 Automatic Yarn Numbering Instrument, with interfacedcomputer.1This test method is under the jurisdiction ofASTM
14、Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.Current edition approved June 1, 2006. Published August 2006. Originallyapproved in 2000. Last previous edition approved in 2000 as D 658700.2For referenced ASTM standards, visit the ASTM website, ww
15、w.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.
16、1 ACW (Automatic Cut and Weigh) Yarn Tester,3SeriesT for textile yarns, Series BCF for bulked continuous filament(BCF) carpet yarns, and Series I for industrial yarns. See Fig.1. The different series testers have different systems fortensioning yarns and different yarn running speeds.6.1.2 Autocount
17、 C4See Fig. 2.6.1.3 Autocount TTA4See Fig. 3.6.1.4 Yarn Count Analyzer (YCA)5See Fig. 4.6.2 Calibration WeightsTwo grams and others as neededto cover the dtex (denier) ranges of interest.7. Sampling7.1 Lot SampleAs a lot sample for acceptance testing,take at random the number of shipping units direc
18、ted in anapplicable material specification or other agreement betweenthe purchaser and the supplier, such as an agreement to usePractice D 2258. Consider shipping cases or other shippingunits to be the primary sampling units.NOTE 2An adequate specification or other agreement between thepurchaser and
19、 the supplier requires taking into account the variabilitybetween shipping units, between packages or ends within a shipping unit,and between specimens from a single package to provide a sampling planwith a meaningful producers risk, consumers risk, acceptable qualitylevel, and limiting quality leve
20、l.7.2 Laboratory SampleAs a laboratory sample for accep-tance testing, take at random from each shipping unit in the lotsample the number of packages directed in an applicablematerial specification or other agreement between the pur-chaser and the supplier such as an agreement to use PracticeD 2258.
21、 Preferably, the same number of packages should betaken from each shipping unit in the lot sample. If differingnumbers of packages are to be taken from shipping units in thelot sample, determine at random which shipping units are tohave each number of packages drawn.7.3 Test SpecimenTest one specime
22、n from each packageof filament yarn and five specimens from each package of spunyarn. See Table 1 for the length of yarn in a specimen.8. Conditioning8.1 Condition the packages in the standard atmosphere fortesting textiles, which is 21 6 1C (70 6 2F) and 65 6 2%relative humidity, for not less than
23、4 h. See Practice D 1776.9. Preparation and Calibration of Apparatus9.1 Set up and calibrate the tester using the manufacturersmanual and the appropriate appendix of this test method.10. Procedure10.1 Check each package for cleanliness, overthrown ends,and any package formation which might interfere
24、 with thefree-running of the yarn from the package.10.2 Position packages to be tested with the thread linepassing in a straight line from the package to the inlet tubewithout snags or additional tension added. Packages may bebeneath or above the inlet jet or tube, as position does not affectthe res
25、ults.10.2.1 If the instrument uses a package changer, place thepackage in a creel and string up the yarn in a manner to preventsnagging or tangling of the ends and excessive tension on theyarn.10.2.2 Prestripping packages is not necessary because theinstruments can be set to prestrip for a specified
26、 time beforetesting.10.3 String up the yarns, input sample, and specimeninformation and test the specimens as directed in the manufac-turers manual. See the appendixes for general informationspecific to the instrument.11. Calculation11.1 Direct Yarn Numbering Systems:3Available from W. Fritz Mezger,
27、 Inc., 155 Hall St., Spartanburg, SC 29302-1523 and Lenzing Technik GrmbH yarn; yarn numberAPPENDIXES(Nonmandatory Information)X1. ACW (AUTOMATIC-CUT-AND-WEIGH) TESTERX1.1 Preparation and CalibrationX1.1.1 Turn on the motor and allow the tester to warm upfor at least 30 min before calibrating the sc
28、ale.X1.1.2 Enter the computer command for automatic zeroingand calibrationX1.1.3 To eliminate errors due to long-term drift, set thetester to automatically tare the balance after each set of 20tests.X1.1.4 Make other periodic checks and inspection of thetester as noted in the manufacturers manual.X1
29、.2 OperationX1.2.1 Set ACW for operation in Mode 2 (Textile 10 to 520denier). For heavy denier use Mode 3 (550 to 1200 denier).X1.2.2 Sampling and specimen information is input to thecomputer in response to prompts. The following sectionsdescribe the subsequent operation of the instrument. (Atest ca
30、nbe aborted at any time by pressing the STOP button, whichinitiates a cleaning cycle.)X1.2.3 The end of the yarn is held near the inlet jet (tube).When a photocell senses the hand or yarn end or the STARTbutton is pressed, Inlet Jets 1 and 2 and the waste gun areturned on and Yarn I transported unde
31、r tension straight throughthe tester to the waste container. When the yarn is sensed onexit from Inlet Jet 2, Inlet Jet 1 is turned off, the nip rollsclosed, and yarn is stripped from the package for a specifiedtime.X1.2.4 The yarn is then cut ahead of the waste gun, and,simultaneously, the Inlet Je
32、t 2 and the waste gun are shut off.The divert gun is turned on and the yarn specimen is blownonto the balance. When the specified specimen length isobtained, the inlet cutter cuts the yarn. After 3-s dwell, thebalance weighs the specimen over a 2-s interval and theaverage dtex (denier) of the yarn i
33、s calculated.X1.2.5 An air jet then blows the specimen off the balanceinto the waste container.X1.3 Other InformationX1.3.1 Computer commands and prompts, error messages,diagnostic test commands, and trouble shooting informationare given in the manufacturers manual.X2. TEXTECHNO AUTOCOUNTX2.1 Prepar
34、ation and CalibrationX2.1.1 Switch the tester on and allow the tester to warm upfor at least 30 min before calibrating the balance.X2.1.2 Zero the balance by pressing its “T” or “Tare” key.Use the automatic calibration function of the balance or putdesired calibration weight on and check the calibra
35、tion. Referto the manufacturers operation manual for calibration details.X2.1.3 During operation the balance will tare automaticallybefore each new test or before each new package (as selectedin the software).X2.2 Operation of the Autocount TTA (Statimat TensileTester Insert)X2.2.1 The yarn travels
36、through the yarn tension guides onthe top rear of the tensile tester.X2.2.2 The collection chamber is lowered onto the balanceand it tares the weight of the chamber from the balance. Aftertaring the weight of the chamber, it is lifted into the receivingposition.X2.2.3 The feed arm grabs the yarn and
37、 pulls it into the niprolls. The draw-off arm places the yarn in the suction head andthe cutters cut the yarn to have a well-defined beginning. Thenip rolls reel off (skein) a specified length of yarn into thesuction head and are aspirated into the collection chamber, onthe balance.X2.2.4 After the
38、specified length has been collected, thesuction head cutters cut the yarn.Any slight variation in the settest length is compensated for in the calculation.X2.2.5 The collection chamber is lowered onto the balanceand the weight is recorded and sent to the computer andsoftware, for conversion to the s
39、pecified count system. Thesample is then ejected from the collection chamber and thechamber is again lowered onto the balance to tare the weight ofthe chamber.X2.2.6 If tensile tests were required and specified in thesoftware, the Statimat performs the tensile tests, and, after thelast break, the ya
40、rn is cut and the magazine moves the nextyarn into position to be tested.X2.3 Operation of the Autocount C ModelX2.3.1 The yarn passes through a tension device and intothe tester from the top. A cutter cuts the yarn end in order tohave a well-defined beginning of the section to be tested. A nipD 658
41、7 00 (2006)e15roll feeding device reels (skeins) the yarn into the collectionchamber by means of an aspirator.X2.3.2 After the programmed length has been collected inthe chamber, the cutter cuts the yarn end. A flap at the bottomof the collection chamber opens and the yarn sample will fallonto the b
42、alance. While the sample is being weighed, the nextsample is being collected in the collection chamber (continuousoperation).X2.3.3 After weighing the sample, an air jet blows thesample from the balance and into a waste container.X2.3.4 The version for combined use with another tester,such as the Dy
43、nafil, is equipped with a yarn switch instead ofa cutter and nip roll feeding device. Knots or splices at thebeginning of a new yarn sample are automatically cut off andblown into the waste chamber. The length of the yarn ismeasured by the intake godet of the Dynafil.X3. YARN COUNT ANALYZER (YCA) TE
44、STERX3.1 OperationX3.1.1 The balance tares the chamber.X3.1.2 The yarn enters the tester from the left. A rapier armpulls the yarn into place, passing it through an adjustablepretensioning device. The yarn is then cut and the beginningend is suctioned into the waste container. As the waste isremoved
45、, the nip rolls start and transport a measured length ofyarn from the package to the collection chamber. This speci-men is cut at the end coming from the package.X3.1.3 The chamber with the specimen is lowered onto thebalance and the mass recorded after the balance has stabilized.The yarn number is
46、calculated and the specimen is ejected fromthe balance to a waste container by an air jet.X3.1.4 The tester is designed to run continuously. Thecollected specimen is transferred from the collection chamberto a balance chamber. Then, while a specimen on the balanceis being weighed, the next specimen
47、is being collected.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement
48、of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for
49、 additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be o
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